Humidifier



FIG. 1 is a top perspective view of the humidifier showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top perspective view thereof with the top cover removed; and

FIG. 8 is a top plan view of FIG. 7. 

The ornamental design for a humidifier, as shown. 